dirtydecrypt + fragnesia: pin CVE fix commits, version-based detect()

Both modules' detect() was precondition-only because we didn't know the
mainline fix commits at port time. Debian's security tracker now
provides them — pinning here turns detect() into a proper version-
based verdict (still with --active for empirical override).

dirtydecrypt (CVE-2026-31635):
- Fix commit a2567217ade970ecc458144b6be469bc015b23e5 in mainline 7.0
  ('rxrpc: fix oversized RESPONSE authenticator length check').
- Debian tracker confirms older stable branches (5.10 / 6.1 / 6.12) as
  <not-affected, vulnerable code not present>: the rxgk RESPONSE-
  handling code was added in 7.0.
- kernel_range table: { {7, 0, 0} }
- detect() pre-checks 'kernel < 7.0 -> SKELETONKEY_OK (predates)' then
  consults the table. With --active, the /tmp sentinel probe overrides
  empirically (catches pre-fix 7.0-rc kernels the version check
  reports as patched).

fragnesia (CVE-2026-46300):
- Fix in mainline 7.0.9 per Debian tracker ('linux unstable: 7.0.9-1
  fixed'). Older Debian-stable branches (bullseye 5.10 / bookworm 6.1
  / trixie 6.12) are still marked vulnerable as of 2026-05-22 - no
  backports yet.
- kernel_range table: { {7, 0, 9} }
- detect() keeps the userns + carrier preconditions, then consults
  the table: 7.0.9+ -> OK; older branches without an explicit backport
  entry -> VULNERABLE (version-only). --active confirms empirically.
- Table is intentionally minimal so distros that DO backport in the
  future flow into 'patched' once their branch lands an entry; until
  then, the conservative VULNERABLE verdict on unfixed branches is
  correct.

Other changes:
- module struct .kernel_range strings updated from 'fix commit not
  yet pinned' to the actual pinned-version prose.
- module_safety_rank bumped 86 -> 87 for both modules (version-pinned
  detect is now real; still below the verified copy_fail family at
  88 so --auto prefers verified modules when both apply).
- Both modules now #include core/kernel_range.h inside their
  #ifdef __linux__ block.
- MODULE.md verification-status sections rewritten: detect() is now
  version-pinned; only the exploit body remains unverified.
- CVES.md note + inventory rows updated: dropped the 'precondition-
  only' language for the pair; all three ported modules now have
  pinned fix references.
- README ⚪ tier description + module list aligned to the new state.

Both detect()s smoke-tested in docker gcc:latest on kernel 6.12.76-
linuxkit: dirtydecrypt correctly reports OK ('predates the rxgk code
added in 7.0'); fragnesia + pack2theroot correctly report
PRECOND_FAIL (no userns / no D-Bus in container). Local macOS + Linux
builds both clean.

README.md

@@ -51,7 +51,7 @@ for every CVE in the bundle — same project for red and blue teams.
 |---|---|---|
 | 🟢 Full chain | **14** | Lands root (or its canonical capability) end-to-end. No per-kernel offsets needed. |
 | 🟡 Primitive | **14** | Fires the kernel primitive + grooms the slab + records a witness. Default returns `EXPLOIT_FAIL` honestly. Pass `--full-chain` to engage the shared `modprobe_path` finisher (needs offsets — see [`docs/OFFSETS.md`](docs/OFFSETS.md)). |
-| ⚪ Ported, unverified | **3** | `dirtydecrypt`, `fragnesia`, `pack2theroot`. Built and registered, but **not yet validated end-to-end** — for the page-cache pair `detect()` is precondition-only; for `pack2theroot` the fix release IS pinned (high-confidence verdict). `--auto` auto-enables `--active` so the probes turn into definitive verdicts on a vulnerable host. Excluded from the 28-module verified counts above. |
+| ⚪ Ported, unverified | **3** | `dirtydecrypt`, `fragnesia`, `pack2theroot`. Built and registered with **version-pinned `detect()`** (Linux 7.0 / 7.0.9 / PackageKit 1.3.5 respectively), but the **exploit bodies** are not yet validated end-to-end. `--auto` auto-enables `--active` to confirm empirically on top of the version verdict. Excluded from the 28-module verified counts above. |
 
 **🟢 Modules that land root on a vulnerable host:**
 copy_fail family ×5 · dirty_pipe · dirty_cow · pwnkit · overlayfs
@@ -66,13 +66,13 @@ netfilter_xtcompat · stackrot · sudo_samedit · sequoia · vmwgfx
 
 **⚪ Ported-but-unverified (not in the counts above):**
 dirtydecrypt (CVE-2026-31635) · fragnesia (CVE-2026-46300) ·
-pack2theroot (CVE-2026-41651) — ported from public PoCs, **not yet
-VM-validated**. The two page-cache writes (dirtydecrypt, fragnesia)
-have precondition-only `detect()` because the CVE fix commits are not
-yet pinned in the modules. `pack2theroot` is a userspace D-Bus
-PackageKit TOCTOU; its fix release (PackageKit 1.3.5, commit
-`76cfb675`) is pinned and `detect()` reads the daemon's version over
-D-Bus — high-confidence verdict.
+pack2theroot (CVE-2026-41651) — ported from public PoCs, **exploit
+bodies not yet VM-validated**. All three have version-pinned `detect()`:
+`dirtydecrypt` against mainline fix commit `a2567217` in Linux 7.0;
+`fragnesia` against mainline 7.0.9 (older Debian-stable branches still
+unfixed); `pack2theroot` against PackageKit fix release 1.3.5
+(commit `76cfb675`), version read from the daemon over D-Bus.
+`--auto` auto-enables `--active` to confirm empirically on top.
 
 See [`CVES.md`](CVES.md) for per-module CVE, kernel range, and
 detection status.